Improvement in stove-pipe dampers



L. 0. ALLEN.y

Stovepipe Damper.

Patented Dec. 15,1868.

TNG. .-84,939.

@wmm (5mm mail L'Evi o. ALLEN, or GARDINER, MAINE.`

Letters Patent No. 84,930, dated December l5, 1.868. I

IMIPROVNIENT IN STOVE-PIPB DAMPERS.

The Schedule referred to in these Lettersj Patent and making part of thesame.

To all whom it may concern .t

Be it known that I, LEVI O. ALLEN, of Gardiner, county of Kennebec,State of Maine, have invented a new anduseful Improved Stove-Damper; audI do hereby declare that the following is 'a full and clear Adescriptionthereof, reference being had to the'accompanyingA drawings, and to theletters of reference marked thereon.

vIn the drawings- Figure l represents a side sectional view of astovepipe with mydamper;

Figure 2, a cross-section of pipe, showing the bottom view of thedamper; and i Figure 3, anothersectional view, vertically cut throughthe pipe.

This invention consists o'f a damper which shall -reflect back the heatwhen shut, and still allow the escape of the smoke in a sufhcientlyrapid manner to keep up the fire. Y

In constructionJ forni my damper of two semi-ovate plates, hingedtogether at the stiaight sides. plates, A and A', are constructed ofsuch a size and shape, in reference to the pipe in which they are to beplaced, that when spread out to the full limit allowed by the sides ofthe pipe, they being centrally hinged in the same, they will form anangle of ninety degrees to each other, and forty-five from thehorizontal line drawn across its axis. This, however, is not imperative,but only gives the greatest per cent. of reflected' heat, which,generally moving upwards in the central part of the iiue, is thrownback, and the smoke allowed to pass by the edges' of the plates A andA', scallops a a, 85e., being cut around their edges in order to preventa too close joint.

The manner of operating these plates is as follows: The plates A andAare hinged upon a shaft, B, which is arranged in the stove-pipe so thatit can be V moved longitudinally through it.

Each plate has one socket, c, which meet in the middle.

In the bottom side of these sockets are cut slots D These a washer, H,on the other end of the shaft, preventsv vit from being pulled throughthe pipe.

This washer is made with avhole in the lowerY part large enoughto beslipped over the shaft, and a smaller socket in the upper part, intowhich the neck of the shaft-end is slipped, thus preventing the Washerfrom coming off, unless lifted up, until the lower hole is on a linewith the shaft. v

The advantages of this device are, that I obtain a simple and cheapdamper, easily manufactured, and

one that reflects back the greatest per cent. of heat from the flue.

Having described my invention, -\Vhat I claim as new, and desire tosecure by Letters Patent, is-

l. The combination and arrangement of the two semi-ovate plates A andA', hinged together upon and operated by a common shaft, B, put throughthe pipe or flue horizontally, substantially as hereinshown anddescribed. 2. 'lhe arrangement of the slots D and D', in combinationwith the pintles E and E', upon the shaft B, substantially as shown. Y

3. -In combination with the shaft B, the key F and -washer H, arrangedand constructed as described and shown.

LEVI 0. ALLEN. Witnesses:

E. H. HYDE, M. P. HYDE.

